class AirConditioner:
    __brand: str
    __price: float

    def __init__(self, brand=None, price=None) -> None:
        self.__brand = brand
        self.__price = price

    def get_brand(self) -> str:
        return self.__brand

    def get_price(self) -> float:
        return self.__price

    def set_brand(self, brand: str) -> None:
        self.__brand = brand

    def set_price(self, price: float) -> None:
        self.__price = price

    def start(self) -> None:
        print('空调开机....')

    def stop(self, time: int) -> None:
        print(f'空调将在{time}分钟后自动关闭')
